Research Topics
| J E SmitsSummaryAffiliation: University of Saskatchewan Country: Canada Publications
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Detail Information
Publications
Thyroid hormone suppression and cell-mediated immunomodulation in American kestrels (Falco sparverius) exposed to PCBsJ E Smits
Toxicology Centre and Veterinary Pathology, University of Saskatchewan, 44 Campus Drive, Saskatoon, Saskatchewan S7N 5B3, Canada
Arch Environ Contam Toxicol 43:338-44. 2002..Immunological effects are discussed in light of the antibody-mediated immunotoxicity found in the same birds and reported previously...
Immunological development in nestling American kestrels Falco sparverius: post-hatching ontogeny of the antibody responseJudit E G Smits
Department of Veterinary Pathology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada SK S7N 5B4
Comp Biochem Physiol A Mol Integr Physiol 151:711-6. 2008..Comparatively, adult kestrels immunized during the same season and following the same protocol, had antibody levels four times higher than those of the nestlings...- An epizootic of avian pox in endemic short-toed larks (Calandrella rufescens) and Berthelot's pipits (Anthus berthelotti) in the Canary Islands, SpainJ E Smits
Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon SK S7N 5B4, Canada
Vet Pathol 42:59-65. 2005..Environmental and biological factors contributing to increased disease susceptibility of these isolated populations must be investigated... - Skeletal pathology in white storks (Ciconia ciconia) associated with heavy metal contamination in southwestern SpainJudit E G Smits
Department of Veterinary Pathology, Western College of Veterinary Medicine, Saskatoon, Saskatchewan S7N 5B4, Canada
Toxicol Pathol 33:441-8. 2005..Bone malformations, measured by leg asymmetry, was only partially explained by bone metals, indicating that a combination of factors was involved with the abnormal development in these young storks... - Spatial, temporal, and dietary determinants of organic contaminants in nestling tree swallows in Point Pelee National Park, Ontario, CanadaJudit E G Smits
Department of Veterinary Pathology, University of Saskatchewan, Saskatoon, Canada
Environ Toxicol Chem 24:3159-65. 2005..006), whereas PCBs came from aquatic prey, Hexagenia mayflies (p = 0.003). Dietary details proved valuable in this study of contaminant transfer in insectivorous vertebrates... - Antibody-mediated immunotoxicity in American kestrels (Falco sparverius) exposed to polychlorinated biphenylsJ E Smits
Toxicology Centre and Veterinary Pathology, University of Saskatchewan, Saskatoon, Canada
J Toxicol Environ Health A 62:217-26. 2001..Both suppression and stimulation of the antibody response are undesirable because this indicates that the immune system is not able to respond normally to challenges by infectious or other disease-causing agents... - Disrupted bone metabolism in contaminant-exposed white storks (Ciconia ciconia) in southwestern SpainJudit E Smits
Department of Veterinary Pathology, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK S7N 5B4, Canada
Environ Pollut 145:538-44. 2007..Storks from the contaminated colony were unable to control P levels and Ca:P ratios within the narrow limits necessary for normal bone development... - Evaluation of the antibody mediated immune response in nestling American kestrels (Falco sparverius)Judit E G Smits
Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, Canada S7N 5B4
Dev Comp Immunol 29:161-70. 2005..Two formulations of the antigen DNP-KLH were compared. DNP-KLH stimulated a stronger and more consistent antibody response in nestling kestrels than did SRBCs... - Courtship behavior of captive American kestrels (Falco sparverius) exposed to polychlorinated biphenylsS A Fisher
Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
Arch Environ Contam Toxicol 41:215-20. 2001..605, p = 0.001) with total PCB residues in the eggs of their mates. A concurrent study found that these same PCB-exposed kestrels experienced a delay in clutch initiation as well as a greater number of completely infertile clutches... - Pathological and physiological responses of ring-necked pheasant chicks following dietary exposure to the fungus Metarhizium flavoviride, a biocontrol agent for locusts in AfricaJ E Smits
Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada
J Wildl Dis 35:194-203. 1999..Histological examination of organs indicated either no changes related to treatment, or normal tissue responses to antigenic challenge... - Validation of immunotoxicology techniques in passerine chicks exposed to Oil Sands tailings waterJ E Smits
Western College of Veterinary Medicine, University of Saskatchewan, 44 Campus Drive, Saskatoon, Saskatchewan, S7N 5B3, Canada
Ecotoxicol Environ Saf 44:105-12. 1999.... - Iris colour of American kestrels varies with age, sex, and exposure to PCBsGary R Bortolotti
Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
Physiol Biochem Zool 76:99-104. 2003..ANOVA with age as a covariate revealed that the amount of red continued to increase throughout life, but PCBs suppressed the development of that colour... - Tree swallows (Tachycineta bicolor) nesting on wetlands impacted by oil sands mining are highly parasitized by the bird blow fly Protocalliphora sppMarie Line Gentes
Department of Veterinary Pathology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
J Wildl Dis 43:167-78. 2007..The heavy blow fly infestation on oil sands-impacted wetlands suggests that oil sands mining disturbs several components of the local ecosystem, including habitat characteristics, blow fly predators, and host resistance to parasites... - Immune function, stress response, and body condition in arctic-breeding common eiders in relation to cadmium, mercury, and selenium concentrationsM Wayland
Prairie and Northern Wildlife Research Centre, Environment Canada P and NR, 115 Perimeter Rd Saskatoon, Saskatchewan, S7N 0X4, Canada
Environ Res 90:47-60. 2002..01), abdominal fat mass (P=0.07), kidney mass (P=0.03), and liver mass (P=0.07). In 1999, hepatic mercury was negatively related to abdominal fat mass (P=0.01), spleen mass (P=0.07) and body mass at capture (P=0.09) in prenesting eiders... - Behavioral variation and its consequences during incubation for American kestrels exposed to polychlorinated biphenylsSheri A Fisher
Department of Biology, University of Saskatchewan, 112 Science Pl, Saskatoon, Sask, Canada S7N 5E2
Ecotoxicol Environ Saf 63:226-35. 2006..PCB-exposed pairs with greater attendance to their eggs and better coordination of incubation duties had improved hatching success... - Brood patches of American kestrels altered by experimental exposure to PCBsSheri A Fisher
Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
J Toxicol Environ Health A 69:1603-12. 2006..Patch sizes were not related to total PCB residue levels in eggs of exposed birds. Brood patches were not related to various incubation behaviors or hatching success in either control or PCB-exposed kestrels... - Effects of exposure to naphthenic acids in tree swallows (Tachycineta bicolor) on the Athabasca oil sands, Alberta, CanadaMarie Line Gentes
Department of Veterinary Pathology, University of Saskatchewan, Saskatoon, Canada
J Toxicol Environ Health A 70:1182-90. 2007..More research needs to be conducted to complete this initial assessment, to determine environmental risks on reclaimed areas where birds will be breeding and where their exposure to NAs could extend for several weeks... - Increased thyroid hormone levels in tree swallows (Tachycineta bicolor) on reclaimed wetlands of the athabasca oil sandsMarie Line Gentes
Department of Veterinary Pathology, University of Saskatchewan, 52 Campus Dr, Saskatoon, Canada
Arch Environ Contam Toxicol 53:287-92. 2007..Modulation of thyroid function might have negative effects on metabolism, behavior, feather development, and molt, which could compromise postfledging survival... - PCB congener profiles in nestling tree swallows and their insect preyZsuzsanna Papp
Department of Veterinary Pathology, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan
Arch Environ Contam Toxicol 52:257-63. 2007.... - Effects of oil sands tailings compounds and harsh weather on mortality rates, growth and detoxification efforts in nestling tree swallows (Tachycineta bicolor)Marie Line Gentes
Department of Veterinary Pathology, University of Saskatchewan, 52 Campus Dr, Saskatoon, SK S7N 5B4, Canada
Environ Pollut 142:24-33. 2006..These results indicate that compared with reference birds, nestlings from OSPM-impacted wetlands may be less able to withstand additional stressors, which could decrease their chances of survival after fledging... - Effects of dietary PCB exposure on adrenocortical function in captive American kestrels (Falco sparverius)Oliver P Love
Avian Science and Conservation Centre, McGill University, 21, 111 Lakeshore Drive, Ste Anne de Bellevue, Quebec, Canada H9X 3V9
Ecotoxicology 12:199-208. 2003.... - Evaluation of two methods for measuring nonspecific immunity in tiger salamanders (Ambystoma tigrinum)Jennifer M W Froese
Toxicology Centre, University of Saskatchewan, 44 Campus Drive, Saskatoon, Saskatchewan, Canada, S7N 5B3
J Wildl Dis 41:209-17. 2005..Based on these results, phagocytic activity of peritoneal neutrophils may be a useful endpoint in immunotoxicologic studies to evaluate the impact of environmental contaminants on innate defense mechanisms in urodele amphibians... - Validation and novel applications of the whole-blood chemiluminescence assay of innate immune function in wild vertebrates and domestic chickensZsuzsanna Papp
Department of Veterinary Pathology, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan S7Nzz 5B4, Canada
J Wildl Dis 43:623-34. 2007..Our results show that the innate immune response of populations of wild animals may be successfully compared using this assay, even when blood cannot be tested until a few days after collection... - The design, construction, and operation of a whole-body inhalation chamber for use in avian toxicity studiesMandy L Olsgard
Toxicology Centre, University of Saskatchewan, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
Inhal Toxicol 20:191-7. 2008..Measurements of various biochemical endpoints associated with benzene and toluene toxicity allowed us to study the effects of airborne pollutants on small nondomesticated birds in a controlled laboratory setting... - Effects of inhalation exposure to a binary mixture of benzene and toluene on vitamin a status and humoral and cell-mediated immunity in wild and captive American kestrelsMandy L Olsgard
Toxicology Centre, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
J Toxicol Environ Health A 71:1100-8. 2008..Based on these findings, future studies need to include immune endpoints to determine the possible increased susceptibility of birds to inhaled toxicants... - Biomarker responses in nesting, common eiders in the Canadian arctic in relation to tissue cadmium, mercury and selenium concentrationsMark Wayland
Environment Canada, Prairie and Northern Region, Prairie and Northern Wildlife Research Centre, 115 Perimeter Rd, Saskatoon, SK, Canada S7N 0X4
Ecotoxicology 12:225-37. 2003..They do, however, suggest that more research is required to elucidate mechanisms by which exposure to these metals could impact body condition...